Ubuntu install boost

Install

sudo apt-get install libboost-dev

Example

#include <iostream>
#include <string>
#include "boost/regex.hpp"
int main() {
    boost::regex reg("(Colo)(u)(r)",
    boost::regex::icase|boost::regex::perl);
    std::string s="Colour, colours, color, colourize";
    s=boost::regex_replace(s,reg,"$1$3");
    std::cout << s;
}

save it to re.cpp
g++ -o re re.cpp lboost_regex
./re
Color, colors, color, colorize